/Engine/Source/Editor/MaterialEditor/Public/MaterialEditingLibrary.h
Get the default vector parameter value from a Material
static [FLinearColor](API\Runtime\Core\Math\FLinearColor) GetMaterialDefaultVectorParameterValue ( [UMaterial](API\Runtime\Engine\Materials\UMaterial) * Material, [FName](API\Runtime\Core\UObject\FName) ParameterName )